fix: BOM Item rate based on uom conversion factor and exchange rate

Author: nabinhait

erpnext/manufacturing/doctype/bom/bom.js

@@ -205,7 +205,12 @@ var get_bom_material_detail= function(doc, cdt, cdn, scrap_items) {
 				'item_code': d.item_code,
 				'bom_no': d.bom_no != null ? d.bom_no: '',
 				"scrap_items": scrap_items,
-				'qty': d.qty
+				'qty': d.qty,
+				"stock_qty": d.stock_qty,
+				"include_item_in_manufacturing": d.include_item_in_manufacturing,
+				"uom": d.uom,
+				"stock_uom": d.stock_uom,
+				"conversion_factor": d.conversion_factor
 			},
 			callback: function(r) {
 				d = locals[cdt][cdn];

erpnext/manufacturing/doctype/bom/bom.py

@@ -170,13 +170,14 @@ def get_rm_rate(self, arg):
 			rate = self.get_valuation_rate(arg)
 		elif arg:
 			if arg.get('bom_no') and self.set_rate_of_sub_assembly_item_based_on_bom:
-				rate = self.get_bom_unitcost(arg['bom_no'])
+				rate = self.get_bom_unitcost(arg['bom_no']) * (arg.get("conversion_factor") or 1)
 			else:
 				if self.rm_cost_as_per == 'Valuation Rate':
-					rate = self.get_valuation_rate(arg)
+					rate = self.get_valuation_rate(arg) * (arg.get("conversion_factor") or 1)
 				elif self.rm_cost_as_per == 'Last Purchase Rate':
-					rate = arg.get('last_purchase_rate') \
-						or frappe.db.get_value("Item", arg['item_code'], "last_purchase_rate")
+					rate = (arg.get('last_purchase_rate') \
+						or frappe.db.get_value("Item", arg['item_code'], "last_purchase_rate")) \
+							* (arg.get("conversion_factor") or 1)
 				elif self.rm_cost_as_per == "Price List":
 					if not self.buying_price_list:
 						frappe.throw(_("Please select Price List"))
@@ -189,7 +190,7 @@ def get_rm_rate(self, arg):
 						"transaction_type": "buying",
 						"company": self.company,
 						"currency": self.currency,
-						"conversion_rate": self.conversion_rate or 1,
+						"conversion_rate": 1, # Passed conversion rate as 1 purposefully, as conversion rate is applied at the end of the function
 						"conversion_factor": arg.get("conversion_factor") or 1,
 						"plc_conversion_rate": 1,
 						"ignore_party": True
@@ -207,7 +208,7 @@ def get_rm_rate(self, arg):
 						frappe.msgprint(_("{0} not found for item {1}")
 							.format(self.rm_cost_as_per, arg["item_code"]), alert=True)
 
-		return flt(rate)
+		return flt(rate) / (self.conversion_rate or 1)
 
 	def update_cost(self, update_parent=True, from_child_bom=False, save=True):
 		if self.docstatus == 2:

erpnext/manufacturing/doctype/bom/test_bom.py

@@ -9,6 +9,7 @@
 from frappe.test_runner import make_test_records
 from erpnext.stock.doctype.stock_reconciliation.test_stock_reconciliation import create_stock_reconciliation
 from erpnext.manufacturing.doctype.bom_update_tool.bom_update_tool import update_cost
+from six import string_types
 
 test_records = frappe.get_test_records('BOM')
 
@@ -63,16 +64,8 @@ def test_update_bom_cost_in_all_boms(self):
 			and item_code='_Test Item 2' and docstatus=1 and parenttype='BOM'""")
 		rm_rate = rm_rate[0][0] if rm_rate else 0
 
-		# update valuation rate of item '_Test Item 2'
-		warehouse_list = frappe.db.sql_list("""select warehouse from `tabBin`
-			where item_code='_Test Item 2' and actual_qty > 0""")
-
-		if not warehouse_list:
-			warehouse_list.append("_Test Warehouse - _TC")
-
-		for warehouse in warehouse_list:
-			create_stock_reconciliation(item_code="_Test Item 2", warehouse=warehouse,
-				qty=200, rate=rm_rate + 10)
+		# Reset item valuation rate
+		reset_item_valuation_rate(item_code='_Test Item 2', qty=200, rate=rm_rate + 10)
 
 		# update cost of all BOMs based on latest valuation rate
 		update_cost()
@@ -96,7 +89,7 @@ def test_bom_cost(self):
 		self.assertEqual(bom.base_raw_material_cost, 480000)
 		self.assertEqual(bom.base_total_cost, 486000)
 
-	def test_bom_cost_multi_uom_multi_currency(self):
+	def test_bom_cost_multi_uom_multi_currency_based_on_price_list(self):
 		frappe.db.set_value("Price List", "_Test Price List", "price_not_uom_dependant", 1)
 		for item_code, rate in (("_Test Item", 3600), ("_Test Item Home Desktop Manufactured", 3000)):
 			frappe.db.sql("delete from `tabItem Price` where price_list='_Test Price List' and item_code=%s",
@@ -131,5 +124,35 @@ def test_bom_cost_multi_uom_multi_currency(self):
 		self.assertEqual(bom.base_raw_material_cost, 27000)
 		self.assertEqual(bom.base_total_cost, 33000)
 
+	def test_bom_cost_multi_uom_based_on_valuation_rate(self):
+		bom = frappe.copy_doc(test_records[2])
+		bom.set_rate_of_sub_assembly_item_based_on_bom = 0
+		bom.rm_cost_as_per = "Valuation Rate"
+		bom.items[0].uom = "_Test UOM 1"
+		bom.items[0].conversion_factor = 6
+		bom.insert()
+
+		reset_item_valuation_rate(item_code='_Test Item', qty=200, rate=200)
+
+		bom.update_cost()
+
+		self.assertEqual(bom.items[0].rate, 20)
+
 def get_default_bom(item_code="_Test FG Item 2"):
 	return frappe.db.get_value("BOM", {"item": item_code, "is_active": 1, "is_default": 1})
+
+def reset_item_valuation_rate(item_code, warehouse_list=None, qty=None, rate=None):
+	if warehouse_list and isinstance(warehouse_list, string_types):
+		warehouse_list = [warehouse_list]
+
+	if not warehouse_list:
+		warehouse_list = frappe.db.sql_list("""
+			select warehouse from `tabBin`
+			where item_code=%s and actual_qty > 0
+		""", item_code)
+
+		if not warehouse_list:
+			warehouse_list.append("_Test Warehouse - _TC")
+
+	for warehouse in warehouse_list:
+		create_stock_reconciliation(item_code=item_code, warehouse=warehouse, qty=qty, rate=rate)

erpnext/stock/get_item_details.py

@@ -390,7 +390,7 @@ def get_price_list_rate(args, item_doc, out):
 		pl_details = get_price_list_currency_and_exchange_rate(args)
 		args.update(pl_details)
 		validate_price_list(args)
-		if meta.get_field("currency") and args.price_list:
+		if meta.get_field("currency"):
 			validate_conversion_rate(args, meta)
 
 		price_list_rate = get_price_list_rate_for(args, item_doc.name) or 0
@@ -567,21 +567,22 @@ def validate_conversion_rate(args, meta):
 		get_field_precision(meta.get_field("conversion_rate"),
 			frappe._dict({"fields": args})))
 
-	if (not args.plc_conversion_rate
-		and args.price_list_currency==frappe.db.get_value("Price List", args.price_list, "currency", cache=True)):
-		args.plc_conversion_rate = 1.0
+	if args.price_list:
+		if (not args.plc_conversion_rate
+			and args.price_list_currency==frappe.db.get_value("Price List", args.price_list, "currency", cache=True)):
+			args.plc_conversion_rate = 1.0
 
-	# validate price list currency conversion rate
-	if not args.get("price_list_currency"):
-		throw(_("Price List Currency not selected"))
-	else:
-		validate_conversion_rate(args.price_list_currency, args.plc_conversion_rate,
-			meta.get_label("plc_conversion_rate"), args.company)
+		# validate price list currency conversion rate
+		if not args.get("price_list_currency"):
+			throw(_("Price List Currency not selected"))
+		else:
+			validate_conversion_rate(args.price_list_currency, args.plc_conversion_rate,
+				meta.get_label("plc_conversion_rate"), args.company)
 
-		if meta.get_field("plc_conversion_rate"):
-			args.plc_conversion_rate = flt(args.plc_conversion_rate,
-				get_field_precision(meta.get_field("plc_conversion_rate"),
-				frappe._dict({"fields": args})))
+			if meta.get_field("plc_conversion_rate"):
+				args.plc_conversion_rate = flt(args.plc_conversion_rate,
+					get_field_precision(meta.get_field("plc_conversion_rate"),
+					frappe._dict({"fields": args})))
 
 def get_party_item_code(args, item_doc, out):
 	if args.transaction_type=="selling" and args.customer: